American singer Katy Perry poses for photos at the launch of her Prismatic world tour in Sydney On March 4, 2014. Katy has announced that the Prismatic world tour will head to Australia in November 2014 with live performances at concerts in Sydney, Perth, Adelaide, Melbourne and Brisbane. AFP PHOTO / Saeed Khan (Photo credit should read SAEED KHAN/AFP/Getty Images)

But perhaps the most notable moment of Katy’s Sunshine guest spot was when host Samantha Armytage told the “Dark Horse” singer that she’s the “biggest female entertainer in the world,” and Katy quickly disagreed!